Circular knife for leather-skiving machines



(No Model.) a

A. J. TEW HEY. CIRCULAR KNIFE FOR LEAT SKIVING MACHINES No. 519,744.Patented May 15, 1894.

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UNITED STATES PATENT OFFICE.

ANDREW J. TEWKSBURY, OF I'IAVERHILL, MASSACHUSETTS.

CIRCULAR KNIFE FOR LEATHER-SKIVING MACHINES.

SEEGIFIGATION forming part of Letters Patent No. 519,744, dated May 15,1894.

Application filed August 24, 18 93.

or support in addition to the bearing which is afiorded by the shaft towhich it is attached. In accordance with this invention a disk orcircular plate is secured to said shaft, above the circular knife,having projecting downwardly from its under side a flange, and thecircular knife has formed in its upper side an annular groove adapted toreceive said flange, it bottoming in said groove. An upwardly projectingflange is preferably formed upon the upper side of said disk or platewhich extends sufliciently high to form in conjunction with said disk orplate an oil retaining cup adapted to receive and retain oil which mayfollow down the shaft to which it is attached.

Figure 1, shows in plan view a rotary disk knife, and supplementalbearing therefor, embodying this invention; Fig. 2, a vertical sectionof the parts shown in Fig. l.

The circular knife a, is secured to the lower end of shaft 1). Acircular disk or plate is shrunk or otherwise secured to said shaft b,above the knife at, having projecting downwardly from its under side aflange c, and projecting upwardly from its upper side a flange o. Theflange 0 extends quite high, so

Serial No. 483,964. (No model.)

as to form in conjunction with the disk orplate, an oil retaining cup,adapted to receive and retain any oil which may follow down the shaft 6.An annular groove is formed in the upper side of the circular knife a,which receives the short flange c it bottoming in said groove. Asupplemental bearing is thereby provided for the circular knife, whichprevents its vibration on the shaft, and continually maintains it in itstrue position thereon.

I claim 1. A circular knife mounted on a shaft and provided with anannular groove on its upper side, in combination with a supplementarysupport for said knife also located on said shaft and consisting of adisk having upon its under side an annular flange 0' adapted to beseated in said annular groove, substantially ANDREW J. TEWKSBURY.

Witnesses:

BERNICE J. Novns, CHARLES B. (JRooKER.

